When I was updating this page, then coupon price was 6.55 USD for Hex Shank HSS Step (in Banggood). Price history, coupons and price alert are available on this page. Best price?
Latest coupon code price check (UTC time):
Banggood (6.55 USD)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Low/high price? Looks like a good price to me (average is 7.34 USD).
Link: Banggood product page
Price: 6.55 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGTACC18, BG53bf17, BG589b2e, BGHTT15, BG2e55ed, BG20236Tool
(probably won’t work, but you can try them out)
Aliexpress
Click here… to search for Drillpro 3Pcs 1/4 Inch Hex Shank HSS Step Drill Bit Set on Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for Drillpro 3Pcs 1/4 Inch Hex Shank HSS Step Drill Bit Set.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).